Ok but Dario has been thinking about AI Safety since 2016 [1], before even GPT-1. I think the simplest explanation is that the Anthropic folks genuinely believe what they say, it just happens to also help their business a lot.
I definitely believe that (to his credit!) Amodei is a true believer in safety. But I also think it was important for many of the deep pockets investors who have been involved in the company since early on to recognize that this would be a potentially defensible moat.
For instance, Amodei co-authored RLHF in 2017 [1], 5 years before it went on to be used to turn GPT-3 into ChatGPT.
[1]: https://proceedings.neurips.cc/paper_files/paper/2017/file/d...